CN203321440U - Underground casing pressure vent valve of heavy oil well - Google Patents
Underground casing pressure vent valve of heavy oil well Download PDFInfo
- Publication number
- CN203321440U CN203321440U CN2013203205273U CN201320320527U CN203321440U CN 203321440 U CN203321440 U CN 203321440U CN 2013203205273 U CN2013203205273 U CN 2013203205273U CN 201320320527 U CN201320320527 U CN 201320320527U CN 203321440 U CN203321440 U CN 203321440U
- Authority
- CN
- China
- Prior art keywords
- valve
- vent valve
- casing pressure
- heavy oil
- vent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Safety Valves (AREA)
Abstract
The utility model provides an underground casing pressure vent valve of a heavy oil well and belongs to the technical field of oil development. A tubing nipple is provided with a rectangular notch which is also utilized as a vent hole; a vent hole of a vent valve main body is connected with the notch in an abutting and welding mode; one end of the tubing nipple is provided with an outer screw; the other end of the tubing nipple is provided with an inner screw; one end of the vent valve main body is provided with internal threads; the other end of the vent valve main body is provided with a valve seat and the air inlet; the inner threads are connected with a plug; the valve seat is connected with the valve. According to the application test of the underground casing pressure vent valve of the heavy oil well in the production of heavy oil, the effect of casing pressure on the production of the heavy oil is eliminated thoroughly, the labor intensity of operators is reduced, the design cost is low, the effect is obvious, and the popularization prospect is good.
Description
Technical field
The utility model relates to a kind of thick oil well casing pressure vent valve, belongs to oil development underground work technical field.
Background technology
In oilfield development process, along with the output of oil gas, in casing of oil-pumping well, can produce a large amount of casing gas, if immediately gas is not discharged, to affect the normal operation of down-hole deep well pump, the oil recovery work often will, to the casing gas of association in rod-pumped well, be bled off pressure.Increased a large amount of workloads.In the thin oil oilfield development process, extensively adopt well head fixed pressure air releasing valve, automatically the gas in drain sleeve.Valve discharging gas under certain pressure is used in the heavy oil development process, causes spool sticky dead by viscous crude, and valve discharging gas under certain pressure can't normally be opened.
In Oil Field management, oil well casing pressure is high, the harm that personnel and equipment are caused:
(1) casing pressure is high, and the producing fluid level in sleeve pipe is descended, and the submergence of pump reduces, and simultaneously, entering in pump will be gas mixture, and the volume that enters the oil in pump reduces, and affect the keying of valve, thereby causes the pump efficiency reduction.
(2) operating personnel, when well head is put casing pressure, take slowly to open sleeve valve and are bled off pressure, and in process, as do not control valve well and will cause the sleeve pipe oil spout, even can cause pollution in wide area.
(3) operating personnel do not control valve well, carry out unexpected open flow, can cause formation sand production serious, and stratum is damaged.
(4) misoperation while entering casing pressure, noise can surpass 70 decibels of industrial enterprise's noise criterias, to operating personnel's health, can impact.
(5) bleed off pressure suddenly, can cause local toxic and harmful content to raise, form potential safety hazard.
(6) the too high oil well fuel-displaced oil well that even causes at intermittence that causes of casing pressure, without output, makes cursor and packing dry grinding, causes packing oil leakage, shortens the life cycle of packing.
The problem of in order to solve this, manually putting casing gas, design a kind of equipment simple to operation, the requirement become a reality.
Summary of the invention
In order to overcome the deficiencies in the prior art, the utility model provides a kind of thick oil well casing pressure vent valve.
A kind of thick oil well casing pressure vent valve, have rectangular notch on tubing nipple, notch is also steam vent, and the steam vent of vent valve main body docks and welds with notch, and an end of tubing nipple has external screw, and the other end of tubing nipple has interior spiral shell button,
One end of vent valve main body has internal thread, and the other end of vent valve main body has valve seat and air inlet; Internal thread connects plug, and valve seat connects valve.
A kind of thick oil well casing pressure venting method, contain following steps; Tubing nipple is connected with upper oil pipe, lower oil pipe,
Sleeve pipe annular space gas pressure in oil well is during higher than the oil pipe internal pressure, and gas is valve jack-up, and gas enters air inlet, enters valve seat again, enters air inlet again and enter the oil pipe inner chamber through sleeve pipe; Gas pressure in sleeve pipe is during lower than the oil pipe internal pressure, and valve is by gravity fall, and valve and valve seat join, and the oil that oil pipe is interior, can not return to sleeve pipe, can only be by the sleeve pipe oil inlet pipe;
Valve seat is used for being connected and sealing with valve; In sleeve pipe, gas is to enter oil pipe by air inlet.
The utility model has the advantages that:
1, reasonably control casing pressure by valve discharging gas under certain pressure, make producing fluid level increase, the pump submergence increases, and output is increased.
2, reduce operating personnel's the number of times that bleeds off pressure, thereby alleviated labour intensity, effectively stopped the injury to operating personnel of toxic and harmful and noise.
3, stopped to run oil and pollute because putting the large tracts of land that casing gas causes.
4, the down-hole vent valve is controlledly at the uniform velocity put casing pressure, has effectively protected stratum, prevents from causing shaking out because instantaneous pressure changes.
5, can not cause the rising of local toxic and harmful content.
6, make the working condition of pump normal, the life cycle of packing extends.
7, do not occur again, because the sticky dead phenomenon of the low valve ball of temperature.
Application test by down-hole casing pressure vent valve in viscous crude is produced, thoroughly solve the impact that casing pressure is produced viscous crude.Alleviate operating personnel's labour intensity.This design cost is cheap, and successful has promotion prospect preferably.
The accompanying drawing explanation
When considered in conjunction with the accompanying drawings, by the detailed description with reference to following, can more completely understand better the utility model and easily learn wherein many advantages of following, but accompanying drawing described herein is used to provide further understanding of the present utility model, form a part of the present utility model, schematic description and description of the present utility model, for explaining the utility model, does not form improper restriction of the present utility model, as schemed wherein:
Fig. 1 is tubing nipple structural representation of the present utility model.
Fig. 2 is vent valve agent structure schematic diagram of the present utility model.
Fig. 3 is overall structure schematic diagram of the present utility model.
Below in conjunction with drawings and Examples, the utility model is further illustrated.
The specific embodiment
Obviously, the many modifications and variations that those skilled in the art do based on aim of the present utility model belong to protection domain of the present utility model.
Embodiment 1: as shown in Figure 1, Figure 2, Figure 3 shows, a kind of thick oil well casing pressure vent valve, rectangular notch 3 is arranged on tubing nipple 1, notch 3 is also steam vent, the steam vent 4 of vent valve main body 2 docks and welds with notch 3, one end of tubing nipple 1 has external screw 6, and the other end of tubing nipple 1 has interior spiral shell button 5
One end of vent valve main body 2 has internal thread 7, and the other end of vent valve main body 2 has valve seat 8 and air inlet 9; Internal thread 7 connects plug, and valve seat 8 connects valve;
Valve also is valve, plays switch;
Valve seat 8 is used for being connected with valve, seals; Air inlet 9 is that in sleeve pipe, gas enters one of passage of oil pipe; Plug, after long-time the use, can be dismantled, and valve is checked, changes;
Thick oil well casing pressure vent valve, tubing nipple and vent valve main body adopt the mode of welding to be bound up.
A kind of application of thick oil well casing pressure vent valve, thick oil well casing pressure vent valve is installed between the upper oil pipe of thick oil well and lower oil pipe, sleeve pipe annular space gas pressure in oil well is during higher than the oil pipe internal pressure, gas is valve jack-up, and gas enters air inlet, enters valve seat again, enters air inlet again and enter the oil pipe inner chamber through sleeve pipe; Gas pressure in sleeve pipe is during lower than the oil pipe internal pressure, and valve is by gravity fall, and valve and valve seat join, and the oil that oil pipe is interior, can not return to sleeve pipe, can only be by the sleeve pipe oil inlet pipe.
At wind city Oilfield Operation District, processed the 10 automatic casing pressure vent valves in cover down-hole, by staff's field experiment, effect is very good.
Application test by down-hole casing pressure vent valve in viscous crude is produced, thoroughly solve the impact that casing pressure is produced viscous crude.Alleviate operating personnel's labour intensity.This design cost is cheap, and successful has promotion prospect preferably.Main is to have eliminated safety factor, has promoted safety in production.
As mentioned above, embodiment of the present utility model is explained, but, as long as not breaking away from fact inventive point of the present utility model and effect can have a lot of distortion, this will be readily apparent to persons skilled in the art.Therefore, within such variation also all is included in protection domain of the present utility model.
Claims (1)
1. a thick oil well casing pressure vent valve, is characterized in that on tubing nipple that rectangular notch is arranged, and notch is also steam vent, the steam vent of vent valve main body docks and welds with notch, one end of tubing nipple has external screw, and the other end of tubing nipple has interior spiral shell button
One end of vent valve main body has internal thread, and the other end of vent valve main body has valve seat and air inlet; Internal thread connects plug, and valve seat connects valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203205273U CN203321440U (en) | 2013-06-05 | 2013-06-05 | Underground casing pressure vent valve of heavy oil well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203205273U CN203321440U (en) | 2013-06-05 | 2013-06-05 | Underground casing pressure vent valve of heavy oil well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203321440U true CN203321440U (en) | 2013-12-04 |
Family
ID=49660803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203205273U Expired - Fee Related CN203321440U (en) | 2013-06-05 | 2013-06-05 | Underground casing pressure vent valve of heavy oil well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203321440U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104213872A (en) * | 2013-06-05 | 2014-12-17 | 中国石油天然气股份有限公司 | Underground casing pressure deflation valve and method of heavy oil well |
-
2013
- 2013-06-05 CN CN2013203205273U patent/CN203321440U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104213872A (en) * | 2013-06-05 | 2014-12-17 | 中国石油天然气股份有限公司 | Underground casing pressure deflation valve and method of heavy oil well |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203626656U (en) | Positive cycle multi-injector negative pressure generator | |
| CN202914018U (en) | Pressure test anti-spraying multifunctional plug | |
| CN203321440U (en) | Underground casing pressure vent valve of heavy oil well | |
| CN106014370A (en) | Oil-pipe under-pressure dragging fracturing device and technology | |
| CN204663485U (en) | Integral type plugging while drilling circulation control valve | |
| CN201180521Y (en) | System used for horizontal well sand pumping | |
| CN203394434U (en) | Underground sleeve pressure relief valve for heavy oil horizontal well | |
| CN207863925U (en) | A kind of submersible electric pump flow string constant-pressure sliding sleeve | |
| CN202955049U (en) | Double-barreled water jet pump | |
| CN204729687U (en) | Lift check valve | |
| CN104213872A (en) | Underground casing pressure deflation valve and method of heavy oil well | |
| CN203626729U (en) | Downhole casing pressure air release valve adjusting device of heavy oil horizontal well | |
| CN105089528A (en) | Wellhead pressure control method and device for pressure control drilling well | |
| CN203321439U (en) | Downhole stable-pressure release valve for heavy oil well | |
| CN203584344U (en) | Sand prevention and well flushing valve for electric pumping wells | |
| CN102287157A (en) | Multifunctional well-killing open flow manifold | |
| CN104514528B (en) | Reducer packing element lytic agent delivery device | |
| CN205154109U (en) | Coal seam gas well well head gas leakage recovery unit | |
| CN207033407U (en) | A kind of casing gas discharging device | |
| CN205591877U (en) | Shutoff grout is for going into device | |
| CN203430474U (en) | Automatic completion fluid injection control device | |
| CN204002725U (en) | A kind of perforation and discharge opeing connection are made tubing string | |
| CN104747139B (en) | Hydraulic drive type oil extraction system | |
| CN204511895U (en) | The modifying device of centrifugal pump | |
| CN104213871A (en) | Underground casing pressure deflation valve and pressure adjusting method of heavy oil well |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131204 Termination date: 20210605 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |